Movie sequels often don't live up to the hype of the original blockbuster, but the same isn't always true of smartphones -- on the contrary, they typically get even better. The Nexus lineup, initially thought of as a "playground" for Android developers to test their apps on, has continually gotten better at its craft (and popularity). Not only that, it's picking up momentum: in less than five months, Google has crafted two Nexus tablets as well as its latest and greatest smartphone known as the Nexus 4, and the attractively priced devices are now facing more interest than they ever have before.
